Le Play recognized three main kinds of family, present in all parts of the world and in all ages of history. These are the patriarchal family, the unstable family and the stem family. The patriarchal family is a very stable family in which children naturally take over the habits and customs of the former generations. The unstable family is a family where the father diverges from the traditions of his ancestors, and young men move o as soon as they can fund themselves. In stem families, only one of the married children (heirs) stays in the family house; the others are given some form of dowry for marriage and establish themselves new families elsewhere. The correct answer is C.